#33187B Color

#33187B is rgb(51, 24, 123) in RGB, hsl(256, 67%, 29%) in HSL, and about cmyk(59%, 80%, 0%, 52%) in CMYK. It has no registered color name of its own — the closest is Persian Indigo (#32127A), very hard to tell apart at ΔE 3.01. White text is the more readable choice on this background.

#33187B

HEX#33187B

RGBrgb(51, 24, 123)

HSLhsl(256, 67%, 29%)

HSVhsv(256, 80%, 48%)

CMYKcmyk(59%, 80%, 0%, 52%)

OKLCHoklch(32.1% 0.154 286.5)

LABlab(18.33% 33.75 -52.26)

LCHlch(18.33% 62.21 302.85)

What #33187B Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #33187B, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Persian Indigo#32127AΔE 3.01 Midnight Blue#191970ΔE 8.61 KSU Purple#512888ΔE 9.5 Spanish Violet#4C2882ΔE 9.85 Cosmic Cobalt#2E2D88ΔE 10.82 Resolution Blue#002387ΔE 11.13

Browse the full index of named colors A-Z or every purple in the library.

#33187B Channel Values

How #33187B breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 51 · G 24 · B 123	8-bit channels as sent to the display
HSL	H 256° · S 67% · L 29%	Easiest model for building lighter and darker variants
HSV	H 256° · S 80% · V 48%	Matches the picker in most design tools
CMYK	C 59% · M 80% · Y 0% · K 52%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	13.48:1 vs white · 1.56:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #33187B background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

TextWhite text13.48:1AA normal AA large AAA normal

Fails AABlack text1.56:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #33187B in the contrast checker.

Colors That Go With #33187B

Pairings derived from color-wheel relationships. The complementary color sits opposite #33187B; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #33187B

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #33187B.

How #33187B Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#33187B

Protanopia#1E1E7B

Protanomaly#281C7B

Deuteranopia#23237B

Deuteranomaly#2A1F7B

Tritanopia#183333

Tritanomaly#252A59

Achromatopsia#2F2F2F

Test a full palette in the color blindness simulator.

Using #33187B in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-33187b: #33187B;

CSS backgroundbackground-color: #33187B;

Tailwind configcolors: { 'color-33187b': '#33187B' }

SwiftUIColor(red: 0.200, green: 0.094, blue: 0.482)

Android XML<color name="color_33187b">#33187B</color>

SVG fillfill="#33187B"

More Purple Colors

#33187B sits in the purple family. These are its neighbours across that family's full range, each with its own breakdown.

150024 fdf8ff 170b22 fdf4ff 1b0d35 faf5ff 1d0731 fae8ff 1e0033 f6cfff 20002e f3e8ff 300052 402060 541490 6600cc 7008e7 8806ce 9900cc a11fff b19cd9 c27aff cebeef e0b2eb

#33187B Frequently Asked Questions

What color is #33187B?

#33187B is a dark purple — rgb(51, 24, 123) in RGB and hsl(256, 67%, 29%) in HSL. It carries no registered color name of its own; the closest named color is Persian Indigo (#32127A), which is very hard to tell apart at a CIE76 distance of 3.01.

What is the RGB value of #33187B?

#33187B is rgb(51, 24, 123) — red 51, green 24, and blue 123 on the 0-255 scale.

What is the CMYK value of #33187B?

#33187B converts to approximately cmyk(59%, 80%, 0%, 52%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #33187B be black or white?

White text is the more readable choice. #33187B scores 13.48:1 against white and 1.56:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #33187B as a CSS color keyword?

No. #33187B is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is midnightblue (#191970) at a CIE76 distance of 8.61, which is clearly related but distinguishable side by side.

Open #33187B in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every purple in the color library, the guide to shades of purple, or the full color library.